A Florida man accused of extorting $25 million from a Fond du Lac businessman claims he was helping authorities and is also putting together an insanity defense, according to a report from the Milwaukee Journal Sentinel.

Adam Meyer claims he helped professional sports leagues and various law enforcement agencies pursue investigations into gambling, according to documents filed by federal prosecutors Tuesday, the Journal Sentinel reported.

Meyer is charged with using fraud and threats to scam $25 million from Gary Sadoff, owner of Badger Liquor in Fond du Lac. The indictment identifies the victim of the scheme as "Victim A," although the Journal Sentinel reported earlier this year that Sadoff is Victim A.

The filing by the U.S. Attorney's office provides sketchy details about Meyer's claim that he broke several laws at the direction of law enforcement, a rarely used defense known as the "public authority" defense, Cary Spivak of the Journal Sentinel reported Tuesday. The federal filing denies Meyer's claim and demands that he disclose the names of all witnesses he intends to call in his defense.

"Meyer has claimed that he cooperated in investigations conducted by numerous federal, state and local law enforcement agencies," states the filing by Greg Haanstad, first assistant U.S. attorney, adding that Meyer has claimed "that he also cooperated in gambling investigations conducted by Major League Baseball, the National Basketball Association and a Division I college football team."

The filing provided no additional details and Haanstad declined to comment. Joel Hirschhorn, Meyer's attorney, also declined to comment.

Meyer, 43, of Fort Lauderdale, Fla., who was indicted in December on six felony counts, is also pleading insanity. U.S. Magistrate Judge Nancy Joseph ruled Tuesday that it was "appropriate" that Meyer's arguments for both defenses remain under seal, according to the Journal Sentinel story.

The federal indictment charges that Sadoff initially purchased gambling tips from Meyer. As time went on Sadoff placed bets with bookies chosen by Meyer. Eventually, Meyer told him to send millions of dollars to accounts he controlled. Meyer told Sadoff that a bookie threatened to hurt Sadoff and Meyer if he did not wire the money, the indictment charges.

In April 2012 Meyer and an unnamed associate flew to Fond du Lac to meet with Sadoff. The other man brandished a firearm and demanded that Sadoff provide more money to pay off a gambling debt, according to the report. Sadoff agreed to provide $9.8 million to Meyer.